تركيب و فراواني ماكروبنتوزها در استخرهاي پرورش نيمه متراكم ميگو در منطقه تياب (استان هرمزگان )

Study composition and abundance Macrobentos in semiintensive shrimp ponds at Tiab area

Sampling for determine of density and composition marcrobentos in shrimp farming ponds in Tiab area, was done from July to Nov 1999 in 9 pond at every month. Samples was calculated by Grab with %2 m2 area. Results showed 4 group macrobentos in ponds that including: Poiychaeta, copepoda, nematoda and shrimp larvae. Maximum frequency was belong to poiychaeta with %49 and minimum frequency was belong to shrimp larvae with %1. Macrobentos density in unit per area was low and farm 1 was lowest in among other farms. Studies showed decreased density and composition of macrobentos in during farming term and some of the groups reached to zero.